How to Write Custom Hooks in Java

I hear people talking about writing custom hooks all the time. And that they can reuse on their own applications. It's sort of like explaining what a custom function is to somebody who's never really written functions, right? If you were coming from like, basic background in usang go tos, how would i explain functions to you? Ou know, they it's a little easier once you get your hands dirty with them. So i an, i want to try to explain s, sorry, finish your sentence please, please. No pese. Someun nrely trn, sotuplesa.